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UNITED srA'rEs PATENTOEEIOE.

JOHN B. CORNELL, OE NEW YORK, N. Y'. z"

CONSTRUCTION F VAULT-LIGHTSN specification of Letters Patent No. 26,479, dated Decembefzo, 1859. f i

To all whom 'it may concern:

Be it lmown that I, JOHN B. CORNELL, of the` city, county, and State of New York, have invented a new and Improved Illuminating Plate or Sash whose component parts of glass and hard metal are combined with each other by an original and peculiar process; and I do hereby declare that the following is a full and exact description of said invention, reference being had to the accompanying drawings, which form a part of this specification.

Figure 1, is a top View of one of my improved illuminatin e section thereof in t e line a, a, of Fig.` l.

Illuminating covers and plates which `are constructed by inserting a series of glasses within the apertures of metallic plates, are

' liable to serious Objections, and especially so when they are placed over openings in street-sidewalks and other positions where they are exposed to knocks, blows, and other rough usage.

The radical defect in the aforesaid description of illuminating plates, grows out of the well known fact thatit is impossible to form joints between the glass and iron portions of said plates of such a character as to prevent the glasses from working loose when the said plates are exposed to rough usage; and consequently, all the illuminating `plates now in use, are constantly liable to have their water-proof qualities destroyed by the loosening or removal of their glasses.

To remedy the aforesaid serious defect in the old fashioned illuminating covers, and plates, is the object of my present` invent-ion.

My invention consists, first, in surrounding each one of any desired number of glasses with a thin band of iron, Or some other suitable hard metal, then placing the glasses thus prepared in a mold of suitable i shape, and then pouring a suiicient quantity of fused iron, or some other suitable metal,

plates, and Fig. 2, is a` ner herein set forth.u l

into said mold to embrace the `peripheries of t said glasses and ,illthe mold; uby which process I produce an illuminatin platee 3, whose glasses cannotybe` loosened y1` any` `fg amount of legitimate rough` usage, and which can not be either `loosened or re@ moved by foul means without great labor and the use of various instruments@Con-` sequently, the Vsaidnplate will be reliably` water-proof, and the rigid embrace of the` glasses by the `metallie body of said plate,` will give ita `much greater degree of stiff ness and strength, in proportion to its@ weight of metal,thancan` possibly bepos y, sessed by any other description offilluminat-X 6,01,

ing plates orsashesl` l "l y y y, i In the accompanyingdrawings*6, is the metallic `body of one 1 offmy improved illu 1 minating plates; c, c, arelthe glassesin said t plate; andd, d, arethehardmetalbands 65,: surrounding the y said glasses, which `pre-y` k# pared them for theiriplaces within the mold" and for the reception of 1themeltedhard metal that forms the body of said illuminat` ing plate.,` y 1 f ,e 1 One or any number "of `glasses ofanyfde sired size or shape, may be combined withfa"` metallic plate of any desiredsize or shape,g by my improved process of constructing e ,1,1 illuminating plates and sashes. What I claim as my invention and desire` to secure "by Letters Patentis-f- Producing an imprpved illuminating" plate by the process :of combining the, illuminat"` ing and the metallicaportions O f 1said plate l with each other, substantially xintheman The above specification of illuminated plate orl sash signed and wit `JOHN B; OOENELL. Witnesses: Z. C. ROBBINS, u,

WM. YORKEAT 

